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Corporate Information and Basis of Presentation (Details) (Minimum [Member]) | 12 Months Ended
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Dec. 31, 2012 Countries
Minimum [Member] |
Business and Basis of Presentation [Line Items] |
Number of Countries Products are Marketed In | 100

X
- Details
Name: | qgen_BusinessAndBasisOfPresentationLineItems
Namespace Prefix: | qgen_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of countries marketing takes place in. + References No definition available. + Details
Name: | qgen_NumberOfCountriesProductsAreMarketedIn
Namespace Prefix: | qgen_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration